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Show 1890.] HELODERMA S U S P E C T U M . 243 Reptilia of Central America and Mexico, places the Heloder-midae between the Xenosauridas and the Anguidas. (62) 1888. Y A R R O W (H. C.).-Bite of the Gila Monster. Forest and Stream, New York, June 14th. Vol. xxx. no. 21, pp. 412, 413.-(This is part vi. of this writer's series of papers on " Snake Bite and its Antidote," in the same newspaper.) (63) 1888. Idem.-A Reference Handbook of the Medical Sciences, embracing the entire range of Scientific and Practical Medicine and Allied Science. By various writers. Illustrated by chromolithographs and fine wood-engravings. Edited by A L B E R T H. B U C K . New York (William Wood & Co.). Vol. vi. p. 171, pi. 28.-(Plate 28 is a chromolithograph of Heloderma suspectum,, and illustrates the article contributed by Dr. Yarrow, entitled " Reptiles, poisonous," pp. 165-174 - a few brief remarks on p. 171, within the title, being devoted to the Heloderma.) (64) 1889. M I T C H E L L (S. W E I R ) . - T h e Poison of Serpents. The Century Illustrated Monthly Magazine, vol. xxxviii. no. 4. New York, August 1889, p. 505.-(A popular account of venomous reptiles, wherein an allusion is made to the poisonous saliva of Heloderma suspectum; an indifferent figure of the reptile illustrates the article.) EXPLANATION OF THE PLATES. PLATE XVI. All figures reduced §. Fi°\ 1. Direct ventral view of the liver, gall-bladder, and ducts, &c. of an adult specimen of Heloderma suspectum. g.b., gall-bladder; r.l., right lobe of liver; l.l., left lobe of liver. 2. Direct dorsal aspect of the same specimen as is shown in figure 1 with additional parts added. I.e., lobulus cardiacus; P.v., portal vein ; d.c, common duct; a.a.v., anterior abdominal vein; g.e., a structure that appeared like a ganglionic enlargement upon the pancreatic duct in the case of the specimen examined; p., pancreas; d., duodenum. 3. Direct ventral view of the heart, lungs, thyroid gland, and other parts of Heloderma suspectum. The various organs are in situ, but the pericardium and other serous membranes have been removed with the exception of I.e., lobus cardiacus. t.r., trachea ; c.a., carotid artery ; t.g., thyroid gland ; r.l., right lung; I.e., anterior cap of the peritoneum (cut short) in which the lobulus cardiacus of the liver is lodged were that, or<mn represented in the drawing in situ ; a.., oesophagus ; i.j., internal jugular ; l.l., left lung; H, heart (showing the ventricle and the two auricles). 4. Ventral view of the head of an adult specimen of Heloderma suspectum with the integuments removed, and showing the poison-glands. The tip of the tongue (T) is protruding from the mouth, and the mandible (31) is partially seen through the superficial layer of muscles. The left poison-gland (p.gl') is represented as being drawn outwards by means of a small dissecting hook and chain, to expose its four ducts which lead through the mandible to the bases of the teeth. On the right side the gland is shown in situ (p.glf as well as the vein that returns the blood from it and afterwards joins the external j ugular. |