75 
POSITION OF THE VISCERA. 
The external landmarks of the principal viscera, in terms 
of gastrosteges are as follows : 
Sex Ss $ 2 ; 9 3h 2 
CALC BLOWS teleleteteielsi= 25-17 25- 19 25- 19 25-17 25-17 25-19 25-15 25-17 25-17 
Gastrosteges ...... 134 140 140 139 139 143 143 154 153 
Peart apex: <<. - 47 47 41 45 46 47 45 52 49 
PETVET CLD eletstels chs le 47 51 45 47 50 50 44 53 52 
TAVEr ONG (sijciciss cis 75 78 83 81 79 82 78 83 85 
Gall bladder ...... 83 88 90 86 87 93 89 96 99 
Kidney, right, tip.. 105 111 112 110 112 107 122 119 127 
Kidney, right, end. 123 127 123 129 136 134 134 144 147 
Kidney, left, tip. 107 114 115 114 115 115 124 122 129 
Kidney, left end.. 125 130 132 131 130 135 135 143 144 
Cal. Ac. Sci., 
Museum No...... 26732 16097 14611 14621 14609 315388 31507 31540 31542 
In this species there is no definite relation between the 
level at which the scale rows are suppressed and the underly- 
ing viscera. The body begins to taper noticeably posterior to 
the liver and in the majority of specimens the last two rows 
to be suppressed terminate between the level of the gall 
bladder and the tip of the right kidney. 
The sex of the specimen to a marked degree influences 
the position of the viscera. In the male the heart is a trifle 
further caudad, there is a wider space between the heart 
and the liver, the anterior kidney is longer and there is much 
less space between this organ and the liver. It will be seen 
that in the female the differences tend to afford more space in 
the abdominal cavity for carrying the young. 
ALLEGED OCCURRENCE IN THE LOO CHOO ISLANDS. 
The presence of this serpent in the Loo Choo Group is 
open to a just suspicion. The type specimen of Trigonoceph- 
alus affinis (Gray) 1849, British Museum “x,” is without a 
locality label. It in no respect differs from those found in 
Japan. British Museum specimen ‘d”, reported from 
Okinawa, is also typical of the Japanese average. The two 
specimens recorded from Yae Yama, United States National 
Museum Nos. 34038 and 34039 likewise differ in but one 
slight abnormality from typical Japanese examples. The color 
of both, and especially No. 34039, is nearly ruined by exposure 
to strong light; each specimen is slightly darker on the inner 
and less exposed sides of the coils as they repose in a jar. 
Details of the scale formule of the two specimens are as 
follows: 
Oiitsh ING AWG Sex. G. 25-V 238-VI 21-IV 19-VII 17-Continued 
BOUBIS” Soogoouoponoodood S$ 1388 55 dif Chi thle abl? aye 
BEMIBEY Goacocadsaou0D068 Oo , SIE) BY RS 68 76 82 119 123 
It will be noted that this formula 25-23-21-19-17, predomi- 
aates in island specimens to the north of Yokohama, while the 
25-23-21-19 type is the prevailing one in Southern Japan. 
