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Show 244 DR. A. GtTNTHER O N A N E W [Apr. 1, PLATE XVII. Fig. 1. Left lateral view of skull and mandible of a specimen of Heloderma suspectum, the latter disarticulated; life-size from the specimen (adult). mx., maxillary; pmx., premaxillary; smx., septomaxillary; ol., co-ossified dermal tubercles ; prfi, prefrontal; fr., frontal; psf, postfrontal; j., jugal; pa., parietal; co., columella; pr.o., prootic; sq., squamosal; pi., pterygoid ; rz., vestige or rudiment of zygomatic arch; q., quadrate; d., dentary; com., complementare; cor., coronoideum ; ar., articulare; an., angulare. 2. Superior view of the right ramus of the mandible of H. suspectum. op., operculare. Other letters as in Fig. 1. 3. Mesial aspect of the right ramus of the mandible of H. suspectum. Letters as in Fig. 1. 4. Superior aspect of the skull of H. suspectum, the mandible removed. ....lacrymal; I.e., lacrymal canal; so., supraoccipital. Other letters as in Fig. 1. 5. Superior aspect of the skull of H. horridum, mandible removed. (After Bocourt.) Lettering as in Fig. 1. 6. Ventral aspect of the skull of H. suspectum, mandible removed; life size. tt., teeth; v., vomer; pi., palatine; tr., transpalatine (os tranversum) ; bs., basisphenoid ; btp., basipterygoid process; eo., exoccipital; bo., basioccipital. Other letters as in Fig. 1. PLATE XVIII. Fig. 1. Dorsal aspect of the right pelvic limb of a specimen of H. suspectum, natural size, f, femur; p., patella; t., tibia; fb., fibula; tfe., tibio-fibulare ; tr., distal tarsalia; e., epiphysis on proximal extremity of metatarsal of the second toe. 2. Ventral aspect of right humerus of a specimen of H. suspectum, natural size, h., humerus. 3. Dorsal aspect of the antibrachium, carpus, and manus of the right pectoral limb of H. suspectum, natural size, ul., ulna ; rd., radius; ue., ulnare ; re., radiale ; p., pisiforme; c, centrale ; cp., distal carpalia. 4. Direct dorsal view of the pelvis and sacrum of H. suspecttim, natural size, pb., pubis ; of., foramen for the passage of the obturator nerve; il., ilium; f.cr., foramen cordiforme; p.p., pectineal process; is., ischium; sv1 and sv'2, the two vertebras that go to form the sacrum, the first and second respectively. 5. Ventral aspect of the sternum and shoulder-girdle and associated parts of H. suspectum, natural size, s., scapula; cl., clavicle ; co., coracoid; ic., interclavicle ; st., sternum ; c.rb., costal ribs. 6. Ventral aspect of the hyoid arches of H. suspectum, somewhat enlarged. b.hy., basihyal; a.co., anterior cornua ; p.co., posterior cornua. 2. Description of a new Species of Deep-sea Fish from Cape {Lophotes fiski). By Dr. A. C. L. GUNTHER, F.R.S. [Eeceived March 14, 1890.] (Plates XIX. & XX.) The Rev. G. H. R. Fisk, C.M.Z.S., has kindly submitted to my examination a highly interesting fish which proves to be a species of Lophotes, a genus still extremely rare in collections. In a letter addressed to our Secretary under date of September 9, 1889, Mr. Fisk says:-" Enclosed you will find a rough sketch of a fish which |